How to backup and restore EFS / IMEI on Android phones

How to backup & restore EFS / IMEI on Android phones. Similar to the partitions on your computer, the Android smartphone too has partitions. One of them is Encrypted File System i.e. EFS. It is basically related with the networking and communication within Android phones. The EFS folder is located in the system directory of your phone and contains some important information about your phones IMEI, Wireless MAC Address, Baseband version, Product Code, System ID and NV Data. EFS can handle all the functions related to connectivity including Cellular Network, Wifi, Bluetooth, IMEI, Network Unlock Information etc. So by any reason if this EFS data gets corrupted then your device will be completely useless & will no longer be recognized by your carrier. Also you’ll be not able to make or receive calls, send or receive messages, connect using Wifi, bluetooth etc. Your IMEI will become null. There are many reasons because of which your EFS data can get corrupted some of them are listed below:

Installing custom ROMs from unknown sources may corrupt EFS data.

Installing corrupted Kernel or unsupported Kernel may also lead to corruption of EFS data.

In rare cases, manually upgrading or downgrading official firmware may also corrupt EFS data.

In order to avoid these unpleasant situations, it is recommended to take a complete backup of EFS data. In this article we’ll discuss some easy 10 methods on how to backup and restore EFS / IMEI on Android phones.

Disclaimer: Try this at your own risk. We’ll not be held responsible if your phone gets damaged by following these methods.

Note: If your computer fails in detecting the device, make sure device drivers are properly installed or not.

Step 12: Now tap on the Backup tap located on the top left corner of the tool. Also select the type of device under the Device filter option. I’m using Samsung International variant phone so I’ll select Samsung Int. Variants. If your phone runs on Qualcomm Snapdragon processor, then you need to select Samsung Int. LTE Variants.

Step 13: Now just tap on the Backup option to start the process.

Step 14: After a minute, the backup process will complete with a successful message displaying on the screen.

Step 15: The backed up EFS file (.tar.gz) will be saved in the EFS Professional\EFSProBackup folder. The same file will also be saved in your phones internal storage under the EFSProBackup folder.

How to restore EFS / IMEI:

Step 1: In EFS Professional tool, click on Restore tab.

Step 2: From the drop down menu in Restore options, select the backed up file.

Step 3: Click on Restore option to initiate the process.

That’s it! You’ve successfully backed up and restored EFS data using EFS Professional Tool. Now you can check your device IMEI number by typing *#06# on the phones dial pad.

Plz get me a good link to download efs back up app for samsung galaxy y plzzz

capa

cant run EFS Professional Tool “not valid win32 application”

Refaat

can i backup EFS alone by TWRP cuz in the method u said to back it up with all other files but if im using a custom rom and i just want to fix this and not go back to old rom cuz if i backup everything and restore it it’ll restore everything not only EFS

Abhijeet Bharekar

Yes you may just select the EFS partition to backup EFS alone..

Refaat

Thank you very much 😀

Nayan Karpe

How to Backup IMEI on Galaxy Ace S5830i ??
Galaxy Toolbox is not Restoring IMEI on a Custom rom & rest all other apps are Not supported !